RFR: 8272392 Lanai: SwingSet2. Black background on expanding tree node [v2]

[Victor Dyakov]

On Fri, 26 Nov 2021 09:02:37 GMT, Alexey Ushakov <avu at openjdk.org> wrote:

>> Removed creation of the separate encoder depending on destination properties as we don't use this info to customize the encoder properties
>
> Alexey Ushakov has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8272392 Lanai: SwingSet2. Black background on expanding tree node
>   
>   Fixed incorrect addition of the values into pipeline state cache. Refactored index initialization. Removed unused flags from MTLClip.

@jayathirthrao @aghaisas please review

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PR: https://git.openjdk.java.net/jdk/pull/6529